Tread module for a horizontal walkway or stairway



FIG. 1 is a top, side, and front perspective view of a tread module for a horizontal walkway or stairway, showing our new design;

FIG. 2 is a top, side, and front perspective view thereof, from the side opposite that shown in FIG. 1;

FIG. 3 is a front, top, and side perspective view similar to FIG. 1 in a vertical position; and,

FIG. 4 is a front, top, and side perspective view opposite that shown in FIG. 3 and in a vertical position. 

CLAIM The ornamental design for a tread module for a horizontal walkway or stairway, as shown. 